Building apron



FIG. 1 is a front perspective view of the claimed building apron, showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a rear view thereof; and,

FIG. 7 is a front view thereof. 

CLAIM We claim the ornamental design for a building apron, as shown and described. 